If the motor is the same one as they put in the B4 rtr then you probably want to change it anyways because it is pretty pants. I think the reedy challenger is a decent motor but it has weird diamond shape brushes in, not sure about availiabilty of those as spares, but I bet there are absolutely tons of standard brushes avaliable at the moment thanks in part to the brushless revolution.
Rules are as stated and have been repeated on here, It's a shame really you should be able to buy an RTR and then just race it, guess that is something we should look into fopr next year. Watching the trucks going round on sunday a fast motor isn't necessarily a good idea and you find that the slightly less agressive trucks are the ones that are up there at the top. You should hear craig nuttings slipper clutch as he goes off the line I think it stops slipping when he goes into the first corner.
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